{"product_id":"cylinder-with-piston-o-54-mm-066-ms660","title":"Cylinder with Piston Ø 54 mm 066, MS660","description":"\u003ch1\u003eSTIHL Cylinder with Piston 54mm for 066 and MS660 - Genuine OEM - 1122 020 1211\u003c\/h1\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSTIHL Cylinder with Piston 54mm\u003c\/strong\u003e (part number \u003cstrong\u003e1122 020 1211\u003c\/strong\u003e) is a genuine OEM top-end assembly for the STIHL \u003cstrong\u003e066\u003c\/strong\u003e, \u003cstrong\u003e066 Magnum\u003c\/strong\u003e, \u003cstrong\u003eMS660\u003c\/strong\u003e and \u003cstrong\u003eMS660 Magnum\u003c\/strong\u003e chainsaws, covering machines manufactured from \u003cstrong\u003eJuly 2003 onwards\u003c\/strong\u003e. Supplied as a complete kit including a \u003cstrong\u003e54mm chrome-lined cylinder\u003c\/strong\u003e, matched piston, two piston rings, gudgeon pin and circlips, it restores compression, power delivery and starting reliability on a worn or damaged top end — returning the engine to its original 91.6cc factory specification. Available from Gustharts, an authorised STIHL dealer with UK stock ready to ship.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠ This part fits 066 and MS660 machines manufactured from July 2003 onwards only.\u003c\/strong\u003e Machines produced before July 2003 require part \u003cstrong\u003e1122 020 1209\u003c\/strong\u003e. These are two distinct components — not format variants of the same number. Confirm your machine's production date via its serial number before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenuine STIHL OEM top-end assembly\u003c\/strong\u003e — manufactured to original specification for correct bore geometry, compression and thermal management\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart number 1122 020 1211\u003c\/strong\u003e — also referenced as 1122-020-1211 and 11220201211; fits 066, 066 Magnum, MS660 and MS660 Magnum from July 2003 onwards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e54mm chrome-plated bore cylinder\u003c\/strong\u003e — original-specification chrome lining for durability, low friction and heat dissipation under sustained heavy cutting loads\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete kit\u003c\/strong\u003e — cylinder, piston, two piston rings, gudgeon pin and circlips supplied as a factory-matched assembly\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCovers Magnum variants\u003c\/strong\u003e — correct fitment for the MS660 Magnum and 066 Magnum alongside standard versions from July 2003\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRestores compression and power\u003c\/strong\u003e — addresses worn, scored or seized top ends, returning engine performance to original specification\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFactory-clearanced piston-to-bore fit\u003c\/strong\u003e — prevents premature ring and bore wear during the critical run-in period\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specification\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; text-align:left; border:1px solid #ddd;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eBrand\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eSTIHL\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eProduct Type\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCylinder with Piston Assembly (top-end kit)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eManufacturer Part Number\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e1122 020 1211\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eAlternate Part Number Formats\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e1122-020-1211, 11220201211\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eBore Diameter\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e54mm (2.13\")\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCylinder Bore Type\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eChrome-plated\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eKit Contents\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCylinder, piston, 2x piston rings, gudgeon pin, circlips\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eCompatible Models\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eSTIHL 066, 066 Magnum, MS660, MS660 Magnum (July 2003 onwards)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003ePre-July 2003 Part\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e1122 020 1209 (separate part — not a format variant of 1211)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eEngine Displacement\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e91.6cc (MS660 \/ 066)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003ePart Type\u003c\/th\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eGenuine OEM Replacement Part\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003e1122 020 1209 vs 1122 020 1211 - Which Do You Need?\u003c\/h2\u003e\n\u003cp\u003eBoth parts are genuine STIHL OEM cylinder and piston assemblies for the 066 and MS660 platform. The sole distinction is production date.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; text-align:left; border:1px solid #ddd;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e1122 020 1209\u003c\/th\u003e\n        \u003cth style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e1122 020 1211 (this product)\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eProduction date\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eBefore July 2003\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eJuly 2003 onwards\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eFits 066\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e✓ (pre-July 2003)\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e✓ (July 2003+)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eFits 066 Magnum\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e—\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e✓\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eFits MS660\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e✓ (pre-July 2003)\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e✓ (July 2003+)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eFits MS660 Magnum\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e—\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e✓\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eBore diameter\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e54mm\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003e54mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eBore type\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eChrome-plated\u003c\/td\u003e\n        \u003ctd style=\"border:1px solid #ddd; padding:10px; text-align:left;\"\u003eChrome-plated\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eConfirm your production date from your machine's serial number or data plate before ordering. If you need help identifying the correct part, \u003ca href=\"\/ja\/pages\/stihl-parts\"\u003euse the STIHL Parts Finder\u003c\/a\u003e or contact Gustharts with your serial number.\u003c\/p\u003e\n\n\u003ch2\u003eAlso Known As\u003c\/h2\u003e\n\u003cp\u003eThe STIHL cylinder with piston assembly is also referred to as a \u003cstrong\u003etop-end rebuild kit\u003c\/strong\u003e, barrel and piston assembly, pot and piston kit, jug and piston set and engine top-end kit. For the MS660 and 066 specifically it is commonly searched as an \u003cstrong\u003eMS660 cylinder kit\u003c\/strong\u003e, \u003cstrong\u003eMS660 Magnum cylinder\u003c\/strong\u003e or \u003cstrong\u003e066 top-end kit\u003c\/strong\u003e. For ordering, use STIHL part number \u003cstrong\u003e1122 020 1211\u003c\/strong\u003e for July 2003 onwards machines, or \u003cstrong\u003e1122 020 1209\u003c\/strong\u003e for pre-July 2003 machines.\u003c\/p\u003e\n\n\u003ch2\u003eOften Replaced Alongside\u003c\/h2\u003e\n\u003cp\u003eA top-end rebuild is the natural point to inspect and renew related components disturbed during cylinder removal:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/ja\/collections\/stihl-spare-parts\"\u003eHead and cylinder gasket set for MS650\/MS660 (1122 007 1053)\u003c\/a\u003e — always fit new gaskets; never reuse old ones during a top-end rebuild\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/ja\/collections\/stihl-spare-parts\"\u003eSpark plug (NGK BPMR7A)\u003c\/a\u003e — replace as standard practice at every top-end rebuild\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/ja\/collections\/stihl-spare-parts\"\u003eAir filter for MS660\u003c\/a\u003e — inspect and replace if contaminated; a blocked filter accelerates bore wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eExplore More\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/ja\/collections\/stihl-spare-parts\"\u003eSTIHL Spare Parts\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/ja\/pages\/stihl-parts\"\u003eSTIHL Parts Finder\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/ja\/pages\/stihl-machinery\"\u003eSTIHL Machinery\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\n\u003ch3\u003eWhich machines does part 1122 020 1211 fit?\u003c\/h3\u003e\n\u003cp\u003ePart 1122 020 1211 fits the STIHL 066, 066 Magnum, MS660 and MS660 Magnum manufactured from July 2003 onwards. Machines before July 2003 require part 1122 020 1209.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is included in the kit?\u003c\/h3\u003e\n\u003cp\u003eThe kit includes: 54mm chrome-plated cylinder, matched piston, two piston rings, gudgeon pin and circlips — everything required for a complete top-end rebuild.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I confirm which cylinder my MS660 needs?\u003c\/h3\u003e\n\u003cp\u003eCheck the production date encoded in your machine's serial number. Pre-July 2003 machines need part 1122 020 1209; July 2003 onwards need 1122 020 1211. Contact Gustharts with your serial number if you need confirmation.\u003c\/p\u003e\n\n\u003ch3\u003eDoes this fit the MS660 Magnum?\u003c\/h3\u003e\n\u003cp\u003eYes. Part 1122 020 1211 covers the MS660, MS660 Magnum, 066 and 066 Magnum from July 2003 onwards. The Magnum variants were not covered by the earlier 1122 020 1209.\u003c\/p\u003e\n\n\u003ch3\u003eIs this a chrome or Nikasil cylinder?\u003c\/h3\u003e\n\u003cp\u003eGenuine STIHL OEM — chrome-plated bore, matching the original factory specification. Follow the run-in procedure in the STIHL service manual when commissioning a new cylinder assembly.\u003c\/p\u003e","brand":"Stihl","offers":[{"title":"Default Title","offer_id":58123755290998,"sku":"ST-1122 020 1211","price":247.92,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/6603\/1348\/files\/STIHL_genuine_spares_from_authorised_dealer.png?v=1775040092","url":"https:\/\/www.gustharts.com\/ja\/products\/cylinder-with-piston-o-54-mm-066-ms660","provider":"Gustharts","version":"1.0","type":"link"}